{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LUCB05BLTQ","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LUCB05BLTQ","canonicalUrl":"https://aoctrl.com/schneider/LUCB05BLTQ","factsUrl":"https://aoctrl.com/api/mcp/products/LUCB05BLTQ","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys U advanced control unit, LUCB05BLTQ, 1.5 kW at 400 V AC, 24 V DC control circuit, manual reset, IP20 front panel.","salesMarkdown":"Rated for 1.5 kW at 400...440 V AC 50/60 Hz, it steps up to 2.2 kW at 500 V AC and 3 kW at 690 V AC, covering a useful spread of three-phase motor loads in European and North American voltage systems. The 24 V DC control circuit draws 130 mA peak on closing with the LUB12 interface, settling to 60 mA sealed — numbers that matter when sizing the control transformer or DC supply for a multi-starter panel. Utilisation categories AC-41, AC-43, and AC-44 mean it handles resistive, motor, and lightly inductive loads respectively, with the AC-44 rating confirming it can switch motor loads up to its rated power without derating. ## Protection functions and trip behaviour This unit provides earth fault protection, protection against phase failure and phase imbalance, and overload and short-circuit protection, all with a manual reset that requires a physical button push after a trip. The thermal overload curve is Class 10, frequency-compensated 40...60 Hz and temperature-compensated -25...70 °C per IEC 60947-6-2 and UL 508 — meaning it tracks motor heating closely enough to protect a standard squirrel-cage motor without nuisance tripping on a normal start. Tripping threshold is 14.2 x Ir +/- 20 %. Phase failure sensitivity is built in — if one phase drops, the unit trips within the operating time of 35 ms opening (with LUB12, LUB32, or LUB38 control circuit interfaces). Dimensions are 45 mm wide, 66 mm high, and 60 mm deep, fitting the standard TeSys U footprint that rows up neatly on DIN rail or a backplate. Rated insulation voltage is 690 V per IEC 60947-6-2 and 600 V per UL 60947-4-1 and CSA C22.2 No 60947-4-1, with safe separation of 400 V SELV between control/auxiliary circuits and the main circuit. Standards compliance includes EN/IEC 60947-6-2, IEC 60947-6-2, UL 60947-4-1 with phase barrier, and CSA C22.2 No 60947-4-1 with phase barrier — covering the main global certification schemes for motor starters. If you're holding a legacy BOM that calls out an older TeSys U control unit, the LUCB05BLTQ is the direct functional equivalent for the 1.5 kW / 400 V class — no adapter or wiring change needed.","metaTitle":"Schneider LUCB05BLTQ TeSys U Advanced Control Unit","metaDescription":"Schneider Electric LUCB05BLTQ TeSys U advanced control unit for motor protection. Rated 1.5 kW at 400 V AC, 24 V DC control. Manual reset, IP20 front.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Motor Starters"],"specifications":{"Depth":"60 mm","Range":"TeSys","Reset":"Manual reset","Width":"45 mm","Height":"66 mm","Load type":"3-phase motor - cooling: self-cooled","Standards":"EN 60947-6-2 IEC 60947-6-2 UL 60947-4-1, with phase barrier CSA C22.2 No 60947-4-1, with phase barrier","Fixing mode":"Plug-in (front face)","Product name":"TeSys U","Motor power kW":"1.5 kW at 400...440 V AC 50/60 Hz 2.2 kW at 500 V AC 50/60 Hz 3 kW at 690 V AC 50/60 Hz","Operating time":"35 ms opening with LUB12 for control circuit 35 ms opening with LUB32 for control circuit 35 ms opening with LUB38 for control circuit 70 ms closing with LUB12 for control circuit 70 ms closing with LUB32 for control circuit 70 ms closing with LUB38 for control circuit","Fire resistance":"960 °C parts supporting live components conforming to IEC 60695-2-12 650 °C conforming to IEC 60695-2-12","lifecycle_stage":"current","Heat dissipation":"2 W for control circuit with LUB12 3 W for control circuit with LUB32 3 W for control circuit with LUB38","Range of product":"TeSys U","Shock resistance":"10 gn power poles open conforming to IEC 60068-2-27 15 gn power poles closed conforming to IEC 60068-2-27","Device short name":"LUCB","Network frequency":"40...60 Hz","Compatibility code":"LUCB","Device application":"Motor control Motor protection","Operating altitude":"2000 m","Tripping threshold":"14.2 x Ir +/- 20 %","Protective treatment":"TH conforming to IEC 60068","Utilisation category":"AC-41 AC-44 AC-43","Vibration resistance":"2 gn, 5...300 Hz, power poles open conforming to IEC 60068-2-6 4 gn, 5...300 Hz, power poles closed conforming to IEC 60068-2-6","Thermal overload class":"Class 10 - frequency limit: 40...60 Hz - temperature compensation: -25...70 °C conforming to IEC 60947-6-2 Class 10 - frequency limit: 40...60 Hz - temperature compensation: -25...70 °C conforming to UL 508","IP degree of protection":"IP20 front panel and wired terminals conforming to IEC 60947-1 IP20 other faces conforming to IEC 60947-1 IP40 front panel outside connection zone conforming to IEC 60947-1","Immunity to microbreaks":"3 ms","Main Function Available":"Earth fault protection Protection against phase failure and phase imbalance Protection against overload and short-circuit Manual reset","Immunity to voltage dips":"70 % / 500 ms conforming to IEC 61000-4-11","Phase failure sensitivity":"Yes","Product or component type":"Advanced control unit","Safe separation of circuit":"400 V SELV between the control and auxiliary circuits conforming to IEC 60947-1 400 V SELV between the control or auxiliary circuit and the main circuit conforming to IEC 60947-1","Typical current consumption":"130 mA at 24 V DC I maximum while closing with LUB12 220 mA at 24 V DC I maximum while closing with LUB32 220 mA at 24 V DC I maximum while closing with LUB38 60 mA at 24 V DC I rms sealed with LUB12 80 mA at 24 V DC I rms sealed with LUB32 80 mA at 24 V DC I rms sealed with LUB38","Product specific application":"Basic protection and advanced functions, communication","[Uc] control circuit voltage":"24 V DC","Resistance to fast transients":"2 kV class 3 serial link conforming to IEC 61000-4-4 4 kV class 4 all circuits except for serial link conforming to IEC 61000-4-4","Resistance to radiated fields":"10 V/m 3 conforming to IEC 61000-4-3","[Ui] rated insulation voltage":"690 V conforming to IEC 60947-6-2 600 V conforming to UL 60947-4-1 600 V conforming to CSA C22.2 No 60947-4-1","Control circuit voltage limits":"20...27 V for DC circuit 24 V in operation 14.5 V for DC circuit 24 V drop-out","[Ue] rated operational voltage":"690 V AC","Immunity to radioelectric fields":"10 V conforming to IEC 61000-4-6","Ambient air temperature for storage":"-40...85 °C","Rated Motor Current Adjustment Range":"1.25...5 A","Ambient air temperature for operation":"-25...70 °C","Resistance to electrostatic discharge":"8 kV level 3 in open air conforming to IEC 61000-4-2 8 kV level 4 on contact conforming to IEC 61000-4-2","[Uimp] rated impulse withstand voltage":"6 kV conforming to IEC 60947-6-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e063fe3b8e8e53cb8e8de897b5f68eba.pdf","sourceUrl":"https://www.se.com/sg/en/product/LUCB05BLTQ/advanced-control-unit-tesys-u-1-255a-3p-motors-protection-diagnostic-class-10-coil-24v-dc-tq10/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LUCB05BLTQ/alternatives.json"},"ai":{"faq":[{"question":"What is LUCB05BLTQ used for?","answer":"It is an advanced control unit for motor control and protection in three-phase motor applications, providing overload protection, short-circuit protection, phase failure detection, and earth fault protection with manual reset."},{"question":"What is LUCB05BLTQ's motor power rating?","answer":"It is rated 1.5 kW at 400...440 V AC 50/60 Hz, 2.2 kW at 500 V AC 50/60 Hz, and 3 kW at 690 V AC 50/60 Hz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LUCB05BLTQ","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/LUCB05BLTQ when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}